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How does a restored oyster reef develop? An assessment based on stable isotopes and community metrics

机译：恢复的牡蛎礁如何发育？基于稳定同位素和社区指标的评估

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Oyster reefs host complex food webs, as their three-dimensional biogenic structure provides habitat for a diverse range of invertebrates and fish. Oyster reefs have suffered severe degradation due to anthropogenic activities. Restoration projects aim to mitigate this habitat loss. We compared the development of a restored subtidal oyster reef to that of a natural reef for 29 months by assessing (1) community metrics (e.g., biomass, diversity), (2) the stable isotope composition of food sources and consumers, and ( 3) biomass-weighted isotopic diversity indices. A clear shift in restored reef community composition occurred 12-15 months after restoration, moving from a community dominated by opportunistic species to a more diverse and evenly distributed community, similar to that of the natural reef. Consumer stable isotope values indicated that the restored reef community was supported by similar food resources and had similar food chain length as the natural reef community by 5-month post-restoration. However, biomass-weighted isotopic diversity indices indicated that the magnitude of the main trophic pathways and characteristics of food web complexity in the restored reef did not recover to natural reef levels until 12-15 months after construction. The functional recovery of the restored reef community was driven by the homogenization of biomass distribution among trophic compartments as oysters and top predators increasingly colonized the reef. Results indicate that oyster reef restoration can support food web functions like those provided by natural reefs. We also demonstrate the importance of combining food web and community structure information in the study of ecological functioning.
机译：牡蛎礁拥有复杂的食物网，因为它们的三维生物成因结构为各种无脊椎动物和鱼类提供了栖息地。由于人为活动，牡蛎礁遭受了严重破坏。恢复项目旨在减轻这种栖息地的损失。我们通过评估（1）社区指标（例如，生物量，多样性），（2）食物来源和消费者的稳定同位素组成，以及（3），比较了恢复的潮汐下牡蛎礁和天然礁在29个月内的发育。生物量加权同位素多样性指数。恢复后的珊瑚礁群落组成发生了明显的转变，恢复后的12-15个月发生了变化，从以机会主义物种为主的群落转变为更加多样化和分布均匀的群落，类似于天然礁。消费者稳定的同位素值表明，恢复后的5个月后，恢复的礁石群落得到了相似的食物资源的支持，并且具有与天然礁石群落相似的食物链长度。然而，生物量加权的同位素多样性指数表明，恢复后的礁石的主要营养途径的大小和食物网复杂性的特征要等到建造后的12-15个月才能恢复到天然礁石的水平。随着牡蛎和顶级捕食者越来越多地定居在珊瑚礁中，营养区间生物量分布的均质化推动了恢复的珊瑚礁群落的功能恢复。结果表明，牡蛎礁的修复可以支持食物网的功能，例如天然礁石提供的功能。我们还证明了在生态功能研究中结合食物网和社区结构信息的重要性。

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  • 来源
    《Marine biology》 |2017年第3期|54.1-54.17|共17页
  • 作者

    Rezek Ryan J.; Lebreton Benoit; Roark E. Brendan; Palmer Terence A.; Pollack Jennifer Beseres;

  • 作者单位

    Texas A&M Univ Corpus Christi, Dept Life Sci, 6300 Ocean Dr, Corpus Christi, TX 78412 USA;

    Univ La Rochelle, CNRS, UMR Littoral Environm & Soc 7266, Inst Littoral & Environm, 2 Rue Olympe de Gouges, F-17000 La Rochelle, France;

    Texas A&M Univ, Dept Geog, Eller O&M Bldg Room 810, College Stn, TX 77843 USA;

    Texas A&M Univ Corpus Christi, Dept Life Sci, 6300 Ocean Dr, Corpus Christi, TX 78412 USA;

    Texas A&M Univ Corpus Christi, Dept Life Sci, 6300 Ocean Dr, Corpus Christi, TX 78412 USA;

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